Diaphragm-mounting



E. c. WOOD AND H. J. w. FAY.

DIAPHRAGM MOUNTING.

APPLICATION FILEDNOV, 12, 1917.

' Patented Dec. 20, 1921 5 SHEETS-SHEET I.

/ Jay/Tags E. C. WOOD AND H. J. W. FAY.

DIAPHRAGM MOUNTING.

APPLlCATlON FILED N0v,12, 1917.

1,401,024, Patented Dev. 20, 1921.

5 SHEETS-SHEET 2.

E. C. WOOD AND H. J. W. FAY.

DIAPHRAGM MOUNTING.

APPLlCATION FILED NOV. I2, 1917 1,401,024; Patented Dec. 20, 1921.

5 SHEETSSHEET 3.

E. C. WOOD AND H. J. W. FAY.

DIAPHRAGM MOUNTING.

APPLICATION FILED NOV; 12, 1917.

1,01,024, Patented Dec. 20, 1921.

5 SHEETS-SHEET 4.

Frgji F/gi f.

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E. C. WOOD AND H. J. W. FAY. DIAPHRAGM MOUNTING, APPLICATION man NOV. '12. 1917.

1,401,024, Patented Dec. 20, 1921.

5 SHEETS-SHEET 5- ENTER: m

I 77/5/17 f7 Tag Ms 75 entree stress rest are nnwenn 0. W001), or'somnavmn, em) HAROLD r. w. rim, or wns'rnono, mssaonusn'r'rs, essrenoas T unnennvn srormr. conrrm, orronrnanzo, name,

A CORPORATION OF MAINE.

DIAPHRAGM-MOUNTING.

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Application filed November 12, 1917. Serial No. 201,4t3.

. To all whom it may camera:

Be it known that we, EDWARD C W001), of 'Somerville, in the county of Mnldleser and State of Massachusetts, and HAROLD J. 'W...FAY, of Westboro, in the county of Worcester, in said State, citizens of the United States, have invented a new and useful Improvement in Diaphragm-Mountings, of which the following is a specification.

Our invention relates to the mounting of a diaphragm in the side of a floating body or ship for the receipt of compressional waves which may be utilized to signal from one ship to another or for the recept1on and detection of sound or other vibrat1ons proceeding upon the ship or the like which it is desirable to detect, as in the case of detecting submarines, etc, it being understood that there is to be used in connection with the diaphragm, mounted as below described, a microphone or other sound-receiving and trinslating device by which the vibrat ons of the diaphragm may be translated into electrical vibrations capable of reception upon, for example, atelephone receiver or other indicator.

Our invention will be understood by reference to the drawings in which it is shown in its preferred embodiment and 1n con'nec tion with various instruments for translating the compressional into electrical vibrations and transmitting them to a proper source of reception.

Figure 1 is a section of a device embodying iour invention. "g. 2 1s a corres onding section of another form of such evice;

Fig. 3 being avrear elevation of the device shown in Fig. 2.

Figs. 4, 5 and 6 show a vertical section and an elevation, partly in section, 'of an-' other form of utilizing our invention; Fig. 6 being a rear elevation of the apparatus as shown in 5.

In each of these views A isthe ships wall or skin. In the ships wall is cut an open ing, referably circular, the edge of which is in 'cated at a. 'In each case there is inserted in the o ening and riveted to the hull at a a ring which projects inward from the hull and is suitably shaped to provide a support against which the casing between said support and said C may be ing located frame, and in each case there 1s an extension B integral with or bolted as at b to the ring B so as preferably to extend the ring B inward and prov1de a second surface against which. the casing or support for the diaphragm may be clamped, a rubber gasket being located between the extension and the casing, the second support being high enough to center the frame properly and hold it steady. lhe diaphragm it will be noted is of less diamor frame holding the diaphra clamped, a rubber gasket F t? eter than the opening in the ring B andneither it nor the framesupporting'it is in contact with the ships kin nor with the frame-supporting means.

In Figs. 1 and 2 the frame for holding the dlaphragm C comprises a casing one wall D of which is a cylinder and another wall of which is a disk D In the form of our invention shown in Fig. 1 the cylinder D has a flange d, which extends outward and which is suitably attached to a ring '0 between which and the flange d is held the dlaphragm C, an outer ring 0 serving to hold the outwardly-bent edge oi. the dia phragm. At some portion of the joint be-' tween the flange (Z and the diaphragm there is provided a packing 0Z to prevent lea age into the interior of the casing.

In Fig. 1 the diaphragm may be tuned in such manner as is described in the appli-' cation of Edward C. Wood, Serial No. 192,014, filed September 18, 1917, or it may be tuned in the manner shown in Fig. 1 where E is the tuning ring having a hearing surface e which engages the surface of the diaphragm within the casing. The ring E is threaded on its exterior and engages is providedl aving connecting rods 6 which are connected both to the spider and to the ring E. The hub E is attached to a shaft.

E carrying a hand-wheel E by which the spideruand hence the ring E are turned.

The shaft E passes out through a stufing box E 'of anyconvenient construction, so that by rotating the shaft E by means of overhanging surfaces of the ring D the hand-wheel E the tension on the diaphragm C may be either'increased or diminished as occasion may r uire.

The casing comprises the cy inder D, its backwall D and the diaphragm C, which are held in place by means of a ring .D which surrounds the cylinder D. The rear wall D of the casing is provided with an flange through which passes a number of screws d which engage the ring D. Between the ring D and the extension B of the ring is a rubber washer F and between the flange d and the ring B is a second rubber washer F and it will be seen that b screwingghe screw d a tight joint will made tween the opposing and the extension B and also between the op sing surfaces of d and B, so that not 0 y will a thoroughly watertight foint be made, but also the diaphragm an its immediate connections will be acoustically insulated from the ships skin A and hence will receive and transmit sounds coming from without the ship rather than those originating inthe ship itself.

- or the purpose of transmitting and utilizing the vibrations of the diaphragm,

there is shown in Fig. 1 a micro bone button G which is attached prefera ly to the center of the diaphragm, but which will take up the vibrations of the diaphragm and transmit them in the well known way to a proper indicator such as a telephone receiver or galvanometer, etc.

In Fig. 2 there is shown a construction similar to that of Fig. 1 in which, however, the microphone Gr is suspended within a casing formed substantially as in' Fig. 1 with, however, gaskets as. at c in order to maintain the interior of the casing watertight. D is a capped inlet through which the interior of the casing may be filled with liquid. The micropl'hone G in this case is suspended by its ca le 9 from an inlet pipe g? surrounding the cable and passing through a stuflin box E, which is located in the cover D or the casin This cover D may'be constructed as s own in Fig. 1, but preferably as shown in Figs. 2 and 3 has cross-ribs for strengthening purposes. We prefer'to attach the tubing 9 to a rubber all 9 through which the cable g passes so as to reduce vibration. b in both Fi 1 and 2 is merely a ct to insure so id aigagement betweent e ring B and its extension B In Figs. 4, 5 and 6 we have shown a similar construction in which, however, instead of. a microphone G or G there is used an oscillator of the Fessenden type, as shown and described in Letters Patent No. 1,167 ,366.

In this case the outer wall of the oscillator takes the place of the cylinder D, this outer wall comprising the field magnet H. In-

mechanism is fully described stead of the flange carried by the rear wall or cover D of the cylinder a ring H is" bolted to the field magnet H by bolts h, and in this case it is desirable to provide the screws 63 with a set nut. (1 There is also provided a cylindrical piece H which is bolted to the field magnet H by bolts h*, the outer end of the cylindrical piece being closed by a disk H which is bolted thereto by bolts h, this structure providing a chamhe for the projecting parts of the oscillator. Y

As before, the diaphragm is lettered C, but in this case it is provided at its center with a boss C having a threaded opening therein into which screws the rod G which passesthrough the core C of the oscillator and ties together the disks C which engage the ends ofth'e copper tube C. As this in the abovereferred-to Letters Patent, its details of construction and operation are not herein disclosed.

The only chan oscillator itself rom that disclosed in said patent is to provide it with a flange C by means of which it is attached to the dia phragm near its outer edge.

It will be .seen that while the construction may be modified somewhat, the purpose of this invention is to provide a means whereby a diaphragm and the sound-receiving mechanism used in connection therewith to transtions other than those which come from outside the shi It has bee found in practice that w ere an openi g has been cut in the wall of a ship and a diaphragm has been riveted t close such an opening, the

diaphragm being in operative relation to a microphone or other sound-receiving and transmitting mechanism, the diaphragm is not only affected by the compressional w'avesreaching it through the water but also by the ships noises, so that at the telephone receiver there is sometimes considerable confusion of sound, from which it is hard to pick out any special signal expected. So far as we know, no construction has as yet been discovered wherein an opening has been cut in the wall of the ship and a diaphragm suspended therein in such a way as to be acoustically insulated from the wall of the ship and thus be capable of receiving and transmitting to a microphone or other receiving device in proper relation therewith the sounds which come from outside the ship and which it is especially desired to receive.

The means for attaching the diaphragm as shown are simple and efiective, but we do not mean to limit ourselves to these means.

in the construction of the It will be noted that the rubber rings which lie between the ring or other extension or connection to the ships skin serve not only to. keep out the water, but also to take up the jar or other vibration caused in the ship by the operation of its engine or otherwise, but other arrangements of such rings or gaskets and other forms of construction may also be made without departing from the spirit of our invention as referred to in our claims.

It will also be noted that in one of the three forms of the invention shown the casing contains a liquid and the microphone is not in direct contact with the diaphragm. It is Well understood, however, that a microphone when so located is in operative relation t the diaphragm; that is to say, the vibrations of the diaphragm will. be taken up by the microphone. We have used the term floating body in connection with this invention, but have more emphatically referred to its use in connection with a ship. We mean by floating body t include a ship, a submarine, a body whether floating or submerged, or any other body useful in navigation having a Wall in which it may be desirable to insert a diaphragm in order to secure a signal or other intelligence from an outside point.

What we claim as our invention is A floating body having an opening in the skin therof, a diaphragm, a casing having a flange, and means adapted to clamp said diaphragm to said flange to close one end of said casing, said diaphragm and said diaphragm-clamping means being of less diameter than said opening, and means for supporting said diaphragm and said casing in said opening comprising a surrounding member attached to said floating body and shaped to overhang the flange of said casing and carrying a shoulder, a resilient packing located between said overhang and said flange, a second resilient packing located on said shoulder, and means engaging said second packing for adjustably clamping said casing t said surrounding member.

EDWARD C. WOOD. 4 HAROLD J. W. FAY. 

